After the Sino-Nepalese War, the Qianlong Emperor promulgated the 29-Article Ordinance for the More Effective Governing of Tibet, which included regulations on selecting lamas.
The Golden Urn was ostensibly introduced to prevent cheating and corruption in the process but it also positioned the Qianlong Emperor as a religious authority capable of adducing incarnation candidates.
[1] The names and dates of birth of each candidate were to be written in the Manchu, Han, and Tibetan languages on metal or ivory slips and placed in the urn.
Article 7 states that the Mongolian and Tibetan Affairs Commission shall draft the methods of lamas' reincarnation, appointment, rewards and punishments, registration, etc., and submit them to the Executive Yuan for approval.
Article 7 states that no group or individual may carry out activities related to searching for and identifying the reincarnated soul boy of the Living Buddha without authorization.
Article 8 states that a lot-drawing ceremony with the Golden Urn is applicable to rinpoches or lamas reincarnated previously in history.